/*
 * Copyright 2012 The AltN8-Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package altn8;

import org.jetbrains.annotations.Nullable;

/**
 *
 */
public abstract class AbstractRegexItem {
    @Nullable
    private String errorText;
    private boolean validated = false;

    /**
     *
     */
    @Nullable
    protected abstract String validate();

    /**
     *
     */
    @Nullable
    public final String getErrorText() {
        if (!validated) {
            errorText = validate();
            validated = true;
        }
        return errorText;
    }

    /**
     *
     */
    public final boolean hasError() {
        return getErrorText() != null;
    }

    @Nullable
    public String getTooltip() {
        return null;
    }
}
